Tightening device.



No. 888,817. PATENTED mm2, 1908.

P. SGHWIGKART.

TIGHTENING DEVIGE.

APPLICATION FILED JUNE 21I 1.907.

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PHILIP SCHWICKARRVOF NEW YORK, N. Y.

TIGHTENING- DEVICE.

Specification of Letters Patent.

Patented June 2, 1908.

l Application led June 21, 1907. Serial No. 380,065.

T0 all whom it may concern.'

Be it known that l, PHILIP Soi-iwioiiAR'r, a citizen of the UnitedStates, and a resident of the city of New York, borough of' Brooklyn, inthe county of Kings and State of New York, have invented a new andImproved Tightening Device, of which the following is a full, clear, andexact description.

The invention relates to metal founding, and its'object is to provide anew and improved tightening device, more especially designed for use inconnection with the clamps employed for holding the sections of a asktogether, the tightening device serving to securely and firmly hold theclamp in position and to draw the sections of the flask firmly together.y

The invention consists of novel features and parts and combinations ofthe same, which will be more fully described hereinafter and thenpointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters 4of reference indicate coi'- responding parts in allthe views.

Figure 1 is a perspective view of the improvement as applied to a flaskand its two tightening clamps 3 Fig. 2 is an enlarged sectional sideelevation of the improvement Fig. 3 is a plan view of the same, Fig. 4is a transverse section of the same on the line 4 4 of Fig. 2, and Fig.5 is a plan view of a modified form of the improvement.

The base A of the tightening device is provided at the top and near oneend thereof with a recess or a seat A for the pivot end B/ of a lever Bto swing in, the said lever B being provided on its top with bearings B2for the trunnions C of a pawl C adapted to engage with its free end C2ksteps A2 rising` from the top of the base A. The top C3 of' the pawl Cextends a distance abovethe top of the lever B.

The device is interposed between the top of the 'flask D and the upperangular' member of a clamp E, as plainly illustrated in Fig. l, the baseA resting on the top of the flask D, the upper end C3 of the pawl Cbeing opposite the under side of the upper angular member of the clampE. The operator now swings the lever B upward, either by hand or by the.

use of a suitable tool, so that the pawl C rises on the ste s A2 untilthe top 'C3 of the pawl abuts againstthe under side of the up- 'yonholding the two sections of the flask D seeo curely together.

lt is understood that the usual two clamps are used on a flask, and eachclamp is engaged by one of the tightening devices, as indicated in Fig,l.

The pawl C extends through an aperture B"l formed in the lever B, asplainlyillustrated in Figs. 2, 3 and 4, but, if desired, the pawl may bemade with double-pointed ends C4 extending on opposite sides of thelever B 7o and engaging steps A3 rising from the top of the base A, itbeing understood that in this oase the pivot or trunnions C5 of the pawlare extended beyond the sides of the lever B, as plainly indicated inFig. 5.

The several parts of the tightening device may be readily detached onefrom the other, so as to allow convenient assembling of the parts whenit is desired to use the same on any one or all of the clamps employedfor 8o holding the sections of a flask together.

Having thus described my invention, l claim as new and desire to secureby Letters Patent:

l. A tightening device comprising a base having steps thereon, a levermounted to swing on the base, and a tightening pawl carried by the leverand having its free end adapted to engage the said steps, apart of theawl opposite the free end projecting be- 9o d the lever and arranged toengage a part to be tightened.

2. A tightening device comprising a base having one of its faces flat,the opposite face being provided with steps, a lever fulcrumed on thesaid base, and a tightening pawl fulcrumed on the said lever and havingits free endv engaging the saidsteps, a-part of the awl projectingbeyond the lever, the outer face of said projecting part of the pawlbeing constructed to engage a part to be tightened.

3. A tightening device comprising a base having a flat lower face, thetop of said base being provided near one end with a recess forming aseat, steps rising from the top of the base, a lever having a pivot endseated in the said recess in the top of the base, and a tightening pawlfulerumed on the said lever near the top thereof, and having its freeend arranged .to engage the said steps, the said pawl rising on thesteps as the lever is swung per member ofthe clamp E, and ona furtherupward, the top ofthe pawl extending above gage the said steps, the pawlhaving a portion the top of the lever for engaging a part to betightened.

4. A tightening device comprising a base, having a at face, steps on itsop osite face, a lever mounted to swing on the }base toward and from thestepped face, the steps rising in the direction of the fulcruin of thelever, and a tightening pawl fulcrumed on the lever and having its freeend extending adjacent to the inner surface of the lever and adapted toenextending outward beyond the outer surface of the lever for engaging apart to be tightened. p

5. The combination with a hook bar for holding the Sections of a flasktogether, of a tightening device adapted to be interposed between theflask and a member of the hook bar, the said tightening devicecomprising a base, a lever fulcrumed on the base, steps on the base, anda tightening pawl fulcrumed on the lever, the free end oi' the pawlbeing arranged to engage the said ste s, a part of the pawl extendingbeyond the ever to engage the said member of' the hook bar, for thepurpose set forth.

6. The combination with the hook bars for holding the sections of amolding flask together, of tightening devices adapted to be interposedbetween the top of the flask and the upper angular members of the hookbars,`

`lever, and a tightening pawl fulcrumed on the lever, the free end ofthe pawl being adapted to engage the said steps, the upper end of thesaid pawl extending above the lever and located opposite the under sideof the upper angular member of a hook bar, the

awl being adapted to rise on the steps as the ever is swung upward andexert an upward pressure on the said member of the hook bar.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

. PHILIP SCHWICKART.

Witnesses:

THEO. G. HosTER, JOHN P. DAVIS.

